Dick Powell is Richard Diamond, Private Detective, the quick-witted, light-hearted detective. Quite possibly radio's first singing detective, Diamond was always quick with a quip or a sarcastic response. He sang his way through over a hundred and fifty fast paced adventures, most of which were written by Blake Edwards before the start of his successful career as a film director.

Everyone from cut-throat business execs to sparring spouses, from real estate men to showgirls, from lawyers to ex-cons, and from fighters to fortune tellers come seeking help with cases of kidnapping, blackmail, mysterious packages, and murder.